Hellhound
Claude Code, Codex and Grok in one chat room. A Windows app.
Ask them separately, or let them debate an idea in turns. Let one write code and the other review it, or have them track down a bug together. No terminal, no API key: it works with your own Claude, ChatGPT and X or Grok accounts.
Get it from the Microsoft Store7-day free trial. Requires Claude Code, Codex and/or Grok Build, installed and signed in with your own accounts.
Use Claude Code, Codex and Grok together
Hellhound is not an AI model. It is a bridge between the AI agents you already use: the answers come from Claude Code, Codex and Grok, and Hellhound keeps them coordinated and their work in one place. Spend less time copying messages between tools and more time on your project.
Separate answers
Each agent answers your message on its own, side by side.
AI debate, in turns
In Discussion mode the agents take turns, working from the room's conversation, up to a turn limit you choose. Stop them at any time.
One writes, the other reviews
Ask one agent to build and the other to review the code, or let them work through a bug together.
Write @Claude, @Codex or @Grok to ask one agent, or @all to ask everyone.
You decide what each agent may do
- Talk: conversation only. Every agent starts here.
- Read: read files and see your screen, without changing anything.
- Build › This folder: file changes are held to your project folder.
- Build › Whole computer: change files, run commands and use programs anywhere your Windows account can. Use it with care and keep backups.
Hellhound asks you once before an agent first gets Read, Build or Whole computer in a room. On Build, agents can also open programs, click and type on your screen. AI agents can make mistakes, so review what they do.
Features
- Claude Code, Codex and Grok together in one room
- Separate rooms for separate projects, each with its own agents, settings and history
- Attach files, images, PDFs, ZIP archives or whole folders
- Choose the model and thinking effort for each agent
- Claude follows your CLAUDE.md instructions
- Code in coloured boxes with a copy button; copy the whole chat or save it as a .md file
- Replies can be read aloud, with a voice for each agent
- Web search, with the searches and pages the agents report
- No Hellhound account, no analytics, no ads: your rooms stay on your computer
What you need
- A 64-bit Windows 10 or Windows 11 PC
- Claude Code, Codex and/or Grok Build, installed and signed in. Claude Code needs a paid Claude plan (Pro or higher) or API credits. Codex works with your ChatGPT account. Grok Build needs an X Premium or SuperGrok subscription.
- An internet connection
Agents use your own plans' limits, just as when you use them directly.
Questions
Do I need an API key?
No. Hellhound has no API or API key of its own. It runs the official Claude Code, Codex and Grok programs, signed in with your own accounts, and never asks for your passwords or API keys.
Do I need to use a terminal?
No. You talk to all your agents in Hellhound's own window. It finds Claude Code, Codex and Grok on your PC automatically, or you show it where they are.
Is Hellhound open source?
No. Hellhound is a Windows app sold through the Microsoft Store, with a 7-day free trial. After the trial, a one-time purchase keeps it working.
Which AI agents does it support?
Claude Code, Codex and Grok today. Support for more AI tools is planned.
Does it work on Mac or Linux?
No. Hellhound is a Windows app for 64-bit Windows 10 and Windows 11.
Is Hellhound made by Anthropic, OpenAI or xAI?
No. Hellhound is an independent app, not affiliated with Anthropic, OpenAI or xAI.